Improvement in sawing-mach ines



UNITED STATES PATENT OFFICE.

ORSAMUS A. WHITE AND ISAAC W. BOSTWIOK, OF NORWALK, OHIO.

IMPROVEMENT IN SAWING-MACHINES.

Specification forming part of Letters Patent No. 50,292, dated October3, 1865.

To all whom it may concern:

Be it known that we, OnsAMUs A. WHITE and ISAAC W. BOSTWIGK, of Norwalk,Huron county, in the State of Ohio, have invented certain new and usefulImprovements in Sawing-Machines for Cutting Logs, Src.; and we do herebydeclare that the following is a full and exact description thereof,reference being had to the accompanying drawings,making a part of thisspecification, and to the letters of reference thereon marked.

In the drawings, Figure l is a side elevation, showing the log engagedor held fast by the holding-levers and the saw in the act of making acut. Fig. 2 is an end elevation of the same. Fig. 3 shows theholdinglevers disengaged and the saw elevated above the log.

Our invention ielates more particularly to certain improvements upon oursawing-machine which was patented to us on the 5th of April, 1864, aswill appear from the following detailed description.

In the drawings, S represents .the floor of the shop where the machineis set; P T, the nearly-vertical standards, disposed in pairs,

'and constituting the frame-work of our machine; O, the saddle and waysupon which the log to be cut is laid, and is operated in the usualmanner; B, the upper, and O the lower, set of holding-levers, which playin the guidestandards P T. There are two sets of these levers, (providedwith teeth,`) so as to hold the logon both sides of the saw and aboveand below the log.

D D are the two holding-ratchets, pivoted at their lower ends by thesaine pivot c that pivots the holdinglevers C to the guide-standards I.These ratchets D pass through the middle of the levers B and their teethsit upon the pin b of these levers and hold said levers fast upon thelog, whether large or small.

K K are vertical connecting-arms working in slots 'n in the top of theframe. The lower ends of these arlns are pivoted to the inner ends ofthe levers G, and their upper ends to the center of the hand'lever Gr.

Gr is the hand-lever which works the levers B and C. Its outer end isprovided with a pulley, c, over which a rope passes and fastens by itstwo ends to the inner ends of the two levers B B. This lever Gr is alsoprovided with a catch, r, which catches into the ratchet u upon the topof the frame. Depressing the lever G raises the outer ends of the leverC C until they strike the bottom ofthe log, and at the same timedepresses the outer ends of levers B B until their inner ends strike thetop of the log, when the hand-lever G is fastened by the ratchet u,thereby holding the log securely until the cut is made.

If it is necessary to hold the log very tightly, (as when the wood isunusually tough,) the ratchets D are forced down upon the pins b oflevers B B', thereby making those levers take a tighter hold upon thelog. By this arrangement we develop the principle of the compound lever,and so apply it to the two sets of levers B and G as to hold the logwith a tighter grasp than we could with simple levers. The pulley e atthe end of lever G, with its cord E attached to levers B B', allowsthese levers to readily adjust themselves to any inequalities of thelog. By this arrangement we hohl the log, be itshort orlong,largeorsmall,smooth orknotty, in the most effective manner, the machineryadjusting itself to the inequalities of the timber. When a cut ismade,by raising the handlever G we cause the lever C to drop from thebottom of the log, and at the same time the levers B B are raised offfrom it, so that the log is passed through between them far enough foranother cut.

L is the saw-guide, dependingfrom the outer end of the arm A, which ispivoted at a to the standards T. fr is the sliding metallic guideplate,which straddles the back of the saw and plays up and down in grooves ofthe hanging guide L, so as'to remove all unnecessary friction from thesaw and to allow it readily to rise and fall in making the drawing cut.

H is the operating hand-lever, pivoted atm.

F is a cord attached to the arm A at 4, runA ning over the pulleys d anddf, and is attached to lever H at 6, so that the lever may operate thearm.

Mis the saw, and I the saw-arm, the end ot' whichis suitably attached tothe drivin g power.

In Fig. et is shown the slideS, provided with two rollers, z z', betweenLwhich the saw-arm reciprocates.

2 is a cord secured at the center to the lever H and at the ends to thetop and bottom of the slide 3, and passes over and under pulleys 1. Itwill thus be seen that,in sawing, by raising lever H the saw is loweredto the log, and at the same time the guide L descends until its lowerend comes onto the top of the log. By lifting lever H when the saw isrunning the roller z is brought down upon the saw-arm I, regulating thecut of the saw as the tender chooses. The guide-plate x guides the sawuntil it has entered the log sufficiently to he steadied by the logitself. The lever H then raises the saw-arm I until the back of the sawis up to the top of the slot in the plate l@when the rope F raises thearm A together with the saw until they are both out of the Way ot' thelog. I

The action of the guide is entirelyindependent of that ot' the saw,leaving no weight for friction upon it, and is worked by the same le`ver that raises and lowers the saw, and is regulated by the distance ofthe cord F from the fulcrum 0f the lever H.

ORSAMUS A. WHITE. ISAAC W. BOSTWIGK.

In presence of- J. A. JoNEs, HERMANN REUss.

